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参数资料
| 型号： | MAX9984ETP+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 10/15页 |
| 文件大小： | 0K |
| 描述： | IC MIXER DOWN CONV 20-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 系列： | MAX9984 |
| RF 型： | 手机，CDMA，EDGE，GSM，WCDMA，WiMAX |
| 频率： | 400MHz ~ 1GHz |
| 混频器数目： | 1 |
| 增益： | 8.1dB |
| 噪音数据： | 9.3dB |
| 次要属性： | 降频变频器 |
| 电流 - 电源： | 265mA |
| 电源电压： | 4.75 V ~ 5.25 V |
| 包装： | 管件 |
| 封装/外壳： | 20-WQFN 裸露焊盘 |
| 供应商设备封装： | 20-TQFN-EP（5x5） |
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
Pin Description
PIN
1, 6, 8, 14
2
3
4, 5, 10, 12,
13, 17
7
9
11
15
16
18, 19
20
EP
NAME
V CC
RF
TAP
GND
LOBIAS
LOSEL
LO1
LO2
LEXT
IF-, IF+
IFBIAS
GND
FUNCTION
Power-Supply Connection. Bypass each V CC pin to GND with capacitors as shown in the Typical
Application Circuit .
Single-Ended 50 ? RF Input. This port is internally matched and DC shorted to GND through a balun.
Requires an external DC-blocking capacitor.
Center Tap of the Internal RF Balun. Bypass to GND with capacitors close to the IC, as shown in the
Typical Application Circuit .
Ground
Bias Resistor for Internal LO Buffer. Connect a 619 ? ± 1% resistor from LOBIAS to the power supply.
Local Oscillator Select. Logic control input for selecting LO1 or LO2.
Local Oscillator Input 1. Drive LOSEL low to select LO1.
Local Oscillator Input 2. Drive LOSEL high to select LO2.
External Inductor Connection. Connect a low-ESR, 47nH inductor from LEXT to GND. This inductor
carries approximately 140mA DC current.
Differential IF Outputs. Each output requires external bias to V CC through an RF choke (see the
Typical Application Circuit ).
IF Bias Resistor Connection for IF Amplifier. Connect a 953 ? ± 1% resistor from IFBIAS to GND.
Exposed Ground Paddle. Solder the exposed paddle to the ground plane using multiple vias.
Detailed Description
The MAX9984 high-linearity downconversion mixer
provides 8.1dB of conversion gain and +25dBm of
IIP3, with a typical 9.3dB noise figure. The integrated
baluns and matching circuitry allow for 50 ? single-
ended interfaces to the RF and the two LO ports. A sin-
gle-pole, double-throw (SPDT) switch provides 50ns
switching time between the two LO inputs with 54dB of
LO-to-LO isolation. Furthermore, the integrated LO
buffer provides a high drive level to the mixer core,
reducing the LO drive required at the MAX9984 ’s
inputs to a -3dBm to +3dBm range. The IF port incor-
porates a differential output, which is ideal for provid-
ing enhanced IIP2 performance.
Specifications are guaranteed over broad frequency
ranges to allow for use in cellular band GSM,
cdma2000, iDEN, and W-CDMA 2G/2.5G/3G base sta-
tions. The MAX9984 is optimized to operate over a
815MHz to 1000MHz RF frequency range, a 570MHz to
850MHz LO frequency range, and a 50MHz to 250MHz
IF frequency range. Operation beyond these ranges is
possible; see the Typical Operating Characteristics for
additional details. For operation at a 400MHz to
500MHz RF frequency range, see the Typical
Operating Characteristics and Table 2 for details.
RF Input and Balun
The MAX9984 RF input is internally matched to 50 ? ,
requiring no external matching components. A DC-
blocking capacitor is required because the input is inter-
nally DC shorted to ground through the on-chip balun.
LO Inputs, Buffer, and Balun
The MAX9984 is ideally suited for low-side LO injection
applications with an optimized 570MHz to 850MHz LO
frequency range. Appropriate tuning allows for an LO
frequency range below 570MHz (RF frequency below
815MHz). For a device with a 960MHz to 1180MHz LO
frequency range, refer to the MAX9986 data sheet. As
an added feature, the MAX9984 includes an internal LO
SPDT switch that can be used for frequency-hopping
applications. The switch selects one of the two single-
ended LO ports, allowing the external oscillator to settle
on a particular frequency before it is switched in. LO
switching time is typically less than 50ns, which is more
than adequate for virtually all GSM applications. If fre-
quency hopping is not employed, set the switch to
either of the LO inputs. The switch is controlled by a
digital input (LOSEL): logic-high selects LO2, logic-low
selects LO1. To avoid damage to the part, voltage must
be applied to V CC before digital logic is applied to
LOSEL. LO1 and LO2 inputs are internally matched to
50 ? , requiring only a 82pF DC-blocking capacitor.
10
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相关代理商/技术参数 |
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|---|---|
| MAX9984ETP+ | 功能描述:上下转换器 SiGe 400-1000MHz Downconversion Mixer RoHS:否 制造商:Texas Instruments 产品:Down Converters 射频:52 MHz to 78 MHz 中频:300 MHz LO频率: 功率增益: P1dB: 工作电源电压:1.8 V, 3.3 V 工作电源电流:120 mA 最大功率耗散:1 W 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-128 |
| MAX9984ETP+D | 制造商:Maxim Integrated Products 功能描述:UP/DOWN CONV MIXER 5V 1GHZ 20TQFN EP - Rail/Tube |
| MAX9984ETP+T | 功能描述:上下转换器 SiGe 400-1000MHz Downconversion Mixer RoHS:否 制造商:Texas Instruments 产品:Down Converters 射频:52 MHz to 78 MHz 中频:300 MHz LO频率: 功率增益: P1dB: 工作电源电压:1.8 V, 3.3 V 工作电源电流:120 mA 最大功率耗散:1 W 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-128 |
| MAX9984ETP+TD | 制造商:Maxim Integrated Products 功能描述:UP/DOWN CONV MIXER 5V 1GHZ 20TQFN EP - Tape and Reel |
| MAX9984ETP-T | 功能描述:上下转换器 RoHS:否 制造商:Texas Instruments 产品:Down Converters 射频:52 MHz to 78 MHz 中频:300 MHz LO频率: 功率增益: P1dB: 工作电源电压:1.8 V, 3.3 V 工作电源电流:120 mA 最大功率耗散:1 W 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-128 |
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